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US 7,111,961 B2Granted
High flux LED lighting device
AssigneeAutomatic Power, Inc.
InventorsStephen E. Trenchard, Alan Trojanowski
Life of this patent
Estimating the term…
Abstract
A lighting device having a plurality of high flux LEDs mounted on a heat sink and surrounded by a diffuser. The heat sink serves to transfer heat from the LEDs to the outside environment. In one embodiment the lighting device is positioned within a fresnel lens to produce a distribution of light.
Claims23
A lighting device comprising:
- (a) a plurality of LEDs disposed in a radial array about a vertical axis;
- (b) a central member having each LED mounted on a vertical surface thereof, the central member made of a thermally conductive material to conduct heat away from the LEDs, wherein the central member comprises three substantially identical right angle prisms with substantially identical square horizontal cross-sections with four vertical surfaces;
- and
- (c) a hollow member having a dentated surface, wherein the dentated surface surrounds the LEDs to diffuse the light emitted from the LEDs.
1 more element
A lighting device comprising:
- (a) a plurality of LEDs disposed in a radial array about a vertical axis;
- (b) a central member having each LED mounted on a vertical surface thereof, the central member made of a thermally conductive material to conduct heat away from the LEDs, wherein the central member has a first and second circular disk mounted on opposed ends of the central member transverse to the vertical axis of the central member;
- and
- (c) a hollow member having a dentated surface with a random pattern of microfaceted angles on the surface, wherein the microfaceted angles diffuse the light emitted from the LEDs and wherein a first end of the hollow member is mounted in a first groove in the first circular disk and a second opposed end of the hollow member is mounted in a second groove in the second circular disk.
1 more element
A lighting device comprising:
- (a) a plurality of LEDs disposed in a radial array about a vertical axis;
- (b) a central member having each LED mounted on a vertical surface thereof, wherein the central member comprises three substantially identical right angle prisms with substantially identical square horizontal cross-sections with four vertical surfaces and wherein the central member is made of a thermally conductive material to conduct heat away from the LEDs;
- (c) a hollow member having a dentated surface with a random pattern of microfaceted angles on the surface, wherein the microfaceted angles diffuse the light emitted from the LEDs;
- and
- (d) a curved optical lens disposed about the vertical axis surrounding the hollow member, wherein the lens converges beams of light emanating from the hollow member in all horizontal directions;
- whereby light emanating from the LEDs passes through the dentated surface of the hollow member and the optical lens to provide a substantially uniform horizontal plane of light.
3 more elements
A lighting device comprising:
- (a) a plurality of LEDs disposed in a radial array about a vertical axis;
- (b) a central member having each LED mounted on a vertical surface thereof, wherein the central member has a first and second circular disk mounted on opposed ends of the central member transverse to the vertical axis of the central member and wherein the central member is made of a thermally conductive material to conduct heat away from the LEDs;
- (c) a hollow member having a dentated surface with a random pattern of microfaceted angles on the surface, wherein the microfaceted angles diffuse the light emitted from the LEDs and wherein a first end of the hollow member is mounted in a first groove in the first circular disk and a second opposed end of the hollow member is mounted in a second groove in the second circular disk;
- and
- (d) a curved optical lens disposed about the vertical axis surrounding the hollow member, wherein the lens converges beams of light emanating from the hollow member in all horizontal directions;
- whereby light emanating from the LEDs passes through the dentated surface of the hollow member and the optical lens to provide a substantially uniform horizontal plane of light.
3 more elements
Dependencies are inferred from the claim text.